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发明名称
SOUPAPE DE SECURITE POUR REGLAGE DE DEBIT DANS UN PUITS
摘要
申请公布号
FR2494339(B1)
申请公布日期
1986.05.02
申请号
FR19810013622
申请日期
1981.07.10
申请人
AVA INTERNATIONAL CORP
发明人
NEIL HOOVER AKKERMAN
分类号
E21B23/03;E21B34/00;E21B34/10;E21B34/14;(IPC1-7):E21B34/10;F16K31/122
主分类号
E21B23/03
代理机构
代理人
主权项
地址
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